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-rw-r--r--sound/ppc/daca.c283
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diff --git a/sound/ppc/daca.c b/sound/ppc/daca.c
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1/*
2 * PMac DACA lowlevel functions
3 *
4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21
22#include <sound/driver.h>
23#include <linux/init.h>
24#include <linux/i2c.h>
25#include <linux/i2c-dev.h>
26#include <linux/kmod.h>
27#include <linux/slab.h>
28#include <sound/core.h>
29#include "pmac.h"
30
31/* i2c address */
32#define DACA_I2C_ADDR 0x4d
33
34/* registers */
35#define DACA_REG_SR 0x01
36#define DACA_REG_AVOL 0x02
37#define DACA_REG_GCFG 0x03
38
39/* maximum volume value */
40#define DACA_VOL_MAX 0x38
41
42
43typedef struct pmac_daca_t {
44 pmac_keywest_t i2c;
45 int left_vol, right_vol;
46 unsigned int deemphasis : 1;
47 unsigned int amp_on : 1;
48} pmac_daca_t;
49
50
51/*
52 * initialize / detect DACA
53 */
54static int daca_init_client(pmac_keywest_t *i2c)
55{
56 unsigned short wdata = 0x00;
57 /* SR: no swap, 1bit delay, 32-48kHz */
58 /* GCFG: power amp inverted, DAC on */
59 if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
60 i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
61 return -EINVAL;
62 return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
63 2, (unsigned char*)&wdata);
64}
65
66/*
67 * update volume
68 */
69static int daca_set_volume(pmac_daca_t *mix)
70{
71 unsigned char data[2];
72
73 if (! mix->i2c.client)
74 return -ENODEV;
75
76 if (mix->left_vol > DACA_VOL_MAX)
77 data[0] = DACA_VOL_MAX;
78 else
79 data[0] = mix->left_vol;
80 if (mix->right_vol > DACA_VOL_MAX)
81 data[1] = DACA_VOL_MAX;
82 else
83 data[1] = mix->right_vol;
84 data[1] |= mix->deemphasis ? 0x40 : 0;
85 if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
86 2, data) < 0) {
87 snd_printk("failed to set volume \n");
88 return -EINVAL;
89 }
90 return 0;
91}
92
93
94/* deemphasis switch */
95static int daca_info_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
96{
97 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
98 uinfo->count = 1;
99 uinfo->value.integer.min = 0;
100 uinfo->value.integer.max = 1;
101 return 0;
102}
103
104static int daca_get_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
105{
106 pmac_t *chip = snd_kcontrol_chip(kcontrol);
107 pmac_daca_t *mix;
108 if (! (mix = chip->mixer_data))
109 return -ENODEV;
110 ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
111 return 0;
112}
113
114static int daca_put_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
115{
116 pmac_t *chip = snd_kcontrol_chip(kcontrol);
117 pmac_daca_t *mix;
118 int change;
119
120 if (! (mix = chip->mixer_data))
121 return -ENODEV;
122 change = mix->deemphasis != ucontrol->value.integer.value[0];
123 if (change) {
124 mix->deemphasis = ucontrol->value.integer.value[0];
125 daca_set_volume(mix);
126 }
127 return change;
128}
129
130/* output volume */
131static int daca_info_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
132{
133 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
134 uinfo->count = 2;
135 uinfo->value.integer.min = 0;
136 uinfo->value.integer.max = DACA_VOL_MAX;
137 return 0;
138}
139
140static int daca_get_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
141{
142 pmac_t *chip = snd_kcontrol_chip(kcontrol);
143 pmac_daca_t *mix;
144 if (! (mix = chip->mixer_data))
145 return -ENODEV;
146 ucontrol->value.integer.value[0] = mix->left_vol;
147 ucontrol->value.integer.value[1] = mix->right_vol;
148 return 0;
149}
150
151static int daca_put_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
152{
153 pmac_t *chip = snd_kcontrol_chip(kcontrol);
154 pmac_daca_t *mix;
155 int change;
156
157 if (! (mix = chip->mixer_data))
158 return -ENODEV;
159 change = mix->left_vol != ucontrol->value.integer.value[0] ||
160 mix->right_vol != ucontrol->value.integer.value[1];
161 if (change) {
162 mix->left_vol = ucontrol->value.integer.value[0];
163 mix->right_vol = ucontrol->value.integer.value[1];
164 daca_set_volume(mix);
165 }
166 return change;
167}
168
169/* amplifier switch */
170#define daca_info_amp daca_info_deemphasis
171
172static int daca_get_amp(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
173{
174 pmac_t *chip = snd_kcontrol_chip(kcontrol);
175 pmac_daca_t *mix;
176 if (! (mix = chip->mixer_data))
177 return -ENODEV;
178 ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
179 return 0;
180}
181
182static int daca_put_amp(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
183{
184 pmac_t *chip = snd_kcontrol_chip(kcontrol);
185 pmac_daca_t *mix;
186 int change;
187
188 if (! (mix = chip->mixer_data))
189 return -ENODEV;
190 change = mix->amp_on != ucontrol->value.integer.value[0];
191 if (change) {
192 mix->amp_on = ucontrol->value.integer.value[0];
193 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
194 mix->amp_on ? 0x05 : 0x04);
195 }
196 return change;
197}
198
199static snd_kcontrol_new_t daca_mixers[] = {
200 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
201 .name = "Deemphasis Switch",
202 .info = daca_info_deemphasis,
203 .get = daca_get_deemphasis,
204 .put = daca_put_deemphasis
205 },
206 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
207 .name = "Master Playback Volume",
208 .info = daca_info_volume,
209 .get = daca_get_volume,
210 .put = daca_put_volume
211 },
212 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
213 .name = "Power Amplifier Switch",
214 .info = daca_info_amp,
215 .get = daca_get_amp,
216 .put = daca_put_amp
217 },
218};
219
220
221#ifdef CONFIG_PMAC_PBOOK
222static void daca_resume(pmac_t *chip)
223{
224 pmac_daca_t *mix = chip->mixer_data;
225 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
226 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
227 mix->amp_on ? 0x05 : 0x04);
228 daca_set_volume(mix);
229}
230#endif /* CONFIG_PMAC_PBOOK */
231
232
233static void daca_cleanup(pmac_t *chip)
234{
235 pmac_daca_t *mix = chip->mixer_data;
236 if (! mix)
237 return;
238 snd_pmac_keywest_cleanup(&mix->i2c);
239 kfree(mix);
240 chip->mixer_data = NULL;
241}
242
243/* exported */
244int __init snd_pmac_daca_init(pmac_t *chip)
245{
246 int i, err;
247 pmac_daca_t *mix;
248
249#ifdef CONFIG_KMOD
250 if (current->fs->root)
251 request_module("i2c-keywest");
252#endif /* CONFIG_KMOD */
253
254 mix = kmalloc(sizeof(*mix), GFP_KERNEL);
255 if (! mix)
256 return -ENOMEM;
257 memset(mix, 0, sizeof(*mix));
258 chip->mixer_data = mix;
259 chip->mixer_free = daca_cleanup;
260 mix->amp_on = 1; /* default on */
261
262 mix->i2c.addr = DACA_I2C_ADDR;
263 mix->i2c.init_client = daca_init_client;
264 mix->i2c.name = "DACA";
265 if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
266 return err;
267
268 /*
269 * build mixers
270 */
271 strcpy(chip->card->mixername, "PowerMac DACA");
272
273 for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
274 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
275 return err;
276 }
277
278#ifdef CONFIG_PMAC_PBOOK
279 chip->resume = daca_resume;
280#endif
281
282 return 0;
283}